By KK Agrawal
Click images to enlarge
The most interesting part was that when a fresh leaf spreads on water, the configuration of the leaf almost resembles a parachute with all its wrinkled cloth and ropes. The leaf goes on growing with its wrinkles smoothing out slowly as the leaf gets bigger and bigger and the growth stops suddenly only to grow out 1 or 2 inches more in a few days time. In the parachute also the expansion stops as soon as the ropes holding out the cloth reaches its maximum length. What a true copy!
In another experiment, I wanted to learn the growth rate of stems suddenly submerged in deeper water. The pad measured was of 16 inches diameter. I lowered the pot so that the leaf got submerged in water 10.5 inches below the previous water level. The results are as follows: